JPH05230962A - Knock-down staircase - Google Patents

Abstract

PURPOSE:To provide knock-down stairs whose components can be manufactured at a low cost and are assembled efficiently with adjustment available for installation angles and heights, and are widely applicable to various ty pes of buildings in different arrangements. CONSTITUTION:The present equipment is composed of a unitized stair 4A that is made up of a horizontal base plate 1, and an upward-looking connecting body 2 and a downward- looking connecting body 3 that are provided in projection respectively to the front end and the rear end of the horizontal base plate 1, and is available for being built up in a staircase in several steps by making the upward-looking connecting body 2 and the downward-looking connecting body 3 fitted together, a bolt 7 that is inserted through a slit 5 provided in the longitudinal direction to the upward-looking connecting body 2 to a nut 6 provided to the downward-looking connecting body 3 for fastening the upwardlooking connecting body 2 and the downward-looking connecting body 3 together and a step board 8 that is fixed to the horizontal base plate 1. The upward-looking connecting body 2 is made up separately from the horizontal base plate 1 and an anchoring body 9 is fixed thereto with a through hole 10 provided on its centerline in the longitudinal direction. Then, a bolt 11 fixed to the horizontal base plate 1 is inserted into the through hole 10, and the upward-looking connecting body 2 is fastened to the horizontal base plate 1 with a nut 12 screwed down onto the bolt 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prefabricated staircase for houses, shops, etc. constructed by connecting staircase units in a plurality of upper and lower stages.

[0002]

2. Description of the Related Art A conventional assembling staircase disclosed in Japanese Patent Publication No. 62-13459 has a cylindrical base joint and a bottom joint which vertically project from a base end and a tip of a horizontal board.
A staircase unit in which the upward joint body and the downward joint body are joined and connected in a plurality of upper and lower stages; a fixing plate horizontally welded in the downward joint body and having a through hole vertically provided in the center; an end of the upward joint body A movable tubular body that is screw-connected to the movable body and is vertically and rotatably fitted in the downward coupling body together with the upward coupling body; a lid plate that is horizontally welded to the movable tubular body and has a nut welded to the central portion; Bolts that are screwed into the nuts through the through holes to tighten and fix the fixing plate and lid plate of the vertical staircase unit;
It is composed of a tread plate fixed to the upper surface side of each horizontal substrate.

[0003]

However, in this prefabricated staircase, as the connecting parts of the vertical staircase unit, the fixing plate, the movable cylinder body and the cover plate are provided in addition to the upward joint body, the downward joint body and the connecting bolt. Since it is necessary, the number of constituent parts is large and the total weight is heavy. In addition, welding work of the fixing plate to the downward joint body, screw cutting work to the movable cylinder body and upward joint body, screw cutting work of the lid plate to the movable cylinder body, welding work of the nut to the lid plate are required. Takes time and effort.

Further, since the cylindrical upward joint body and the downward joint body are rotatably fitted to each other, the staircase unit is set at a set position until the upper and lower staircase units are rotationally adjusted and then fixed by bolts. It requires an auxiliary worker to stop and hold the stairs, and the assembly work of a series of stair units is complicated and labor cost is high.

Further, since the bolts and nuts are arranged on the longitudinal centerlines of the cylindrical upward joint body and the downward joint body, when the bolt is loosened for some reason, the upward joint body and the downward joint body are There is a danger that the upper and lower staircase units will be distorted in the assembled state and the stairs will rock, because they are mutually rotatable.

Therefore, the object of the present invention is to reduce the cost of materials and the weight of the entire staircase because the number of components is small, and the number of welding points is reduced. It is to provide a prefabricated staircase that can be operated efficiently and at low cost. Another object of the present invention is to provide a prefabricated staircase in which the upward and downward joint bodies do not rotate relative to each other in the basic component parts, so that dangerous rocking of the entire staircase is accurately prevented.

Still another object of the present invention is that since the arrangement angle and height interval between the upper and lower staircase units of the staircase unit can be adjusted, the staircase unit can be widely used in various buildings having different installation modes, and the spiral staircase The purpose is to provide a prefabricated staircase that allows the staircase with a landing to be constructed arbitrarily.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A prefabricated staircase according to the present invention will be described below with reference to the accompanying drawings, in which a base plate 1 and a base plate 1 are provided with an upward joint body 2 and a downward joint body 3, respectively. Are vertically projected, and the upward joint body 2 and the downward joint body 3 are fitted to each other to be connected in a plurality of upper and lower stages.
A, 4B; screwed from a longitudinal elongated hole 5 provided in one of the upward joint body 2 and the downward joint body 3 into a nut portion 6 fixedly provided in the other, thereby connecting the upward joint body 2 and the downward joint body 3 to each other. The bolt 7 is fastened and fixed; and the tread plate 8 is fixed to the upper surface of the horizontal substrate 1.

Upward joint body 2 of staircase units 4A, 4B
One of the downward joint body 3 and the downward joint body 3 is separated from the horizontal substrate 1, and the separated upward joint body 2 or downward joint body 3 is formed.
The fixing body 9 is fixed to the fixing body 9, and the fixing body 9 is provided with the through hole 10 on the vertical center line of the upward coupling body 2 or the downward coupling body 3 which is separately configured, and the bolt 11 is vertically fixed to the horizontal substrate 1. ,
A nut 12 is screwed into a bolt 11 inserted into the through hole 10 to separate and configure the upward joint body 2 or the downward joint body 3.
Is fastened and fixed to the horizontal substrate 1.

In the prefabricated staircase of claims 3 and 4, one of the upward joint body 2 and the downward joint body 3 of the staircase units 4C, 4D is constructed separately from the horizontal substrate 1, and the separated upward joint body is constructed. The fixing body 13 is fixedly mounted on the downward coupling body 2 or the downward coupling body 3, and the bolt 15 is inserted into the through hole 14 of the fixing body 13 provided on the vertical centerline of the upward coupling body 2 or the downward coupling body 3 which is separated. By screwing the bolt 15 into the nut portion 16 fixedly mounted on the horizontal substrate 1, the separately arranged upward joint body 2 or downward joint body 3 is tightened and fixed to the horizontal substrate 1.

In the prefabricated staircase of claims 5 and 6, one of the upward joint body 2 and the downward joint body 3 of the staircase units 4E, 4F is constructed separately from the horizontal board 1, and the upward joint body is constructed separately. 2 or downward fitting body 3 with mounting body 17 fixed thereto, and tapping screw 19 is screwed into through hole 18 provided in mounting plate 17 into receiving hole 20 provided in horizontal substrate 1 so as to form a separate upward fitting joint. The body 2 or the downward joint body 3 is fastened and fixed to the horizontal substrate 1.

[0012]

The assembled staircase of the present invention can be assembled from the lower floor side to the upper floor side or can be assembled from the upper floor side to the lower floor side, for example, from the lower floor side. When assembling, the base staircase unit 4G is fixed to the floor structure 24 on the lower floor as shown in FIG. In this base staircase unit 4G, the downward joint body 3 is omitted from the standard staircase unit 4, and the horizontal board 1 is directly fixed to the floor structure 24 by screws 25.

As shown in FIG. 19, the downward joint body 3 of the first stage stair unit 4 is fitted to the upward joint body 2 of the base stair unit 4G, and the upward joint body 2 and the downward joint body 3 are connected to each other. The bolt 7 is tightened and fixed. The bolt 7 and the tool for rotating the bolt 7 are inserted through the upper openings of the upward joint body 2 and the downward joint body 3. Next, as illustrated in FIG. 18, the downward joint body 3 of the second-stage staircase unit 4
Is fitted into the upward joint body 2 of the first-stage staircase unit 4, and the upward joint body 2 and the downward joint body 3 are similarly tightened and fixed by bolts 7.

After assembling the staircase unit 4 from the top to the second staircase from the bottom in this manner, the upward joint body 2 of the staircase unit 4 from the second to the top is shown in FIGS. 16 and 17. As described above, the downward joint body 3 of the top staircase unit 4H is fitted, and the upward joint body 2 and the downward joint body 3 are tightened and fixed by the bolt 7. This staircase unit 4H for top is obtained by omitting the upward joint body 2 from the standard type staircase unit 4, and instead of the upward joint body 2, the base structure of the horizontal substrate 1 has a floor structure 26 on the upper floor or A bracket plate 27 is fixed to the landing structure. The bracket plate 27 is fixed to the floor structure 26 by bolts or screws 28.
It is fastened and fixed to.

The height interval between the upper and lower staircase units 4 and 4 is adjusted by using the play length between the elongated hole 5 and the bolt 7 in the vertical direction every one or several steps or only at a specific step. .. In this way, a linear staircase in which the vertical staircase units 4 and 4 are arranged in a straight line from the lower floor to the upper floor is constructed.

As shown in FIGS. 17 to 20, the bolt 7
A single-sided toothed washer or a double-sided toothed washer 21 is inserted between the head portion of the above and the upward joint body 2 or the downward joint body 3, and the washer 21 is strongly pressed by tightening the bolt 7. The washer 21 bites on each abutting surface to firmly connect the upward joint body 2 and the downward joint body 3, and the loosening of the bolt 7 prevents the staircase unit from sliding down.

When constructing a staircase with a landing, constructing a curved staircase that has a curved portion in part or the whole is sequentially curved, or constructing a spiral staircase, a vertical stair unit at the landing portion and the curved portion It is necessary to change and adjust the arrangement angle between them. For this application, after the upward joint body 2 or the downward joint body 3 is rotated about the vertical axis, the separation type staircase units 4A, 4B, which are fixed to the horizontal substrate 1,
4C, 4D, 4E or 4F are used.

A fixed staircase unit 4 in which an upward joint body 2 and a downward joint body 3 are fixed to a horizontal substrate 1 from the beginning is used for constructing a linear portion other than a landing portion and a curved portion. It is also possible to construct a straight part with the stair units 4A to 4F. In addition, the entire straight staircase may be constructed by the separate staircase units 4A to 4F. Further, in either the landing portion, the curved portion or the straight portion, it is also possible to use the separate staircase units 4A to 4F and the fixed staircase unit 4 in a combination of one or several.

When the separate type staircase unit 4A in which the upward joint body 2 is separated as shown in FIGS. 1 to 4 is used, the lower staircase unit 4 as shown in FIGS. 18 and 19 is used. Upward coupling body 2 or base staircase unit 4
After the downward joint body 3 of the staircase unit 4A is fitted into the upward joint body 2 of D, and the upward joint body 2 and the downward joint body 3 are fastened and fixed by bolts 7, the position of the staircase unit 4A is fixed to the horizontal substrate. 1, the upward coupling body 2 is rotated about the fixing bolt 11 by a required angle, and then the nut 12 is rotated.
To fix the upward joint body 2 to the horizontal substrate 1.

A one-sided toothed washer or a two-sided toothed washer 22 is interposed between the fixing body 9 and the horizontal substrate 1 and between the nut 12 and the fixing body 9, and the nut 12 is tightened to strongly press the washer 22. As a result, the upward joint body 2 is firmly connected to the horizontal base plate 1 so as not to rotate, and the staircase unit 4A does not rotate or rattling due to the loosening of the nut 12. The upward joint body 2 fixed at this position is fitted with the separation type staircase unit 4A of the next stage or the downward joint body 3 of the fixed staircase unit 4 and is tightened and fixed by a bolt 7.

When another separate type staircase unit 4B in which the downward joint body 3 is separated as shown in FIG. 27 is used, the downward joint body 3 of the upper staircase unit 4 or the staircase unit 4H for the top is used. After fitting the upward joint body 2 of the staircase unit 4B into the downward joint body 3 and tightening and fixing the downward joint body 3 and the upward joint body 2 with the bolt 7, the position of the horizontal substrate 1 of the staircase unit 4B is fixed. On the other hand, the downward joint body 3 is rotated around the fixing bolt 11 by a required angle, and then the nut 12 is tightened to fix the downward joint body 3 to the horizontal substrate 1.

A one-sided toothed washer or a two-sided toothed washer 22 is provided between the fixing body 9 and the horizontal substrate 1 and between the nut 12 and the fixing body 9, and the washer 22 is strongly pressed by tightening the nut 12. As a result, the upward joint body 2 is rigidly connected to the horizontal base plate 1 so as not to be rotatable, and the loosening of the nut 12 prevents the staircase unit 4A from rattling. The downward joint body 3 fixed in this position is fitted with the upward joint body 2 of the angle adjusting type staircase unit 4B of the next stage or the standard type staircase unit 4 and is fixed by tightening with the bolt 7.

When using the separation type staircase unit 4C in which the upward coupling body 2 is separately configured as shown in FIG. 28, the upward coupling body 2 of the lower fixed type staircase unit 4 or the staircase unit 4G for the base is used. After fitting the downward joint body 3 of the staircase unit 4C into the upward joint body 2 and tightening and fixing the upward joint body 2 and the downward joint body 3 with the bolts 7, the upward joint body 2 of the staircase unit 4C is directed upward. The joint body 2 is rotated by a required angle around the bolt 15 inserted in the nut portion 16, and then the bolt 15 is tightened to fix the upward joint body 2 to the horizontal substrate 1.

Between the fixing body 13 and the horizontal substrate 1 and the bolt 15
A single-sided toothed washer or a double-sided toothed washer 23 is inserted between the fixing member 13 and the fixing member 13, and the washer 2 is tightened by tightening the bolt 15.
By upwardly pressing 3, the upward joint body 2 becomes a horizontal substrate 1
Since the bolts 15 are loosely connected, the staircase unit 4A does not rotate or rattle. The upwardly coupled joint body 2 fixed at this position is fitted with the downwardly coupled joint body 3 of the separation type staircase unit 4C or the fixed type staircase unit 4 at the next stage, and is similarly tightened and fixed by the bolt 7.

When using the separation type staircase unit 4D in which the downward coupling body 3 is separately configured as shown in FIG. 29, the downward coupling body 3 of the upper fixed type staircase unit 4 or the staircase unit 4H for the top is used. After fitting the upward joint body 2 of the staircase unit 4D into the downward joint body 3 and tightening and fixing the downward joint body 3 and the upward joint body 2 with bolts 7, the downward joint body 3 of the staircase unit 4D is directed downward with respect to the horizontal substrate 1. The joint body 3 is rotated around the bolt 15 inserted in the nut portion 16 by a required angle, and the bolt 15 is tightened to fix the downward joint body 3 to the horizontal substrate 1.

Between the fixing body 13 and the horizontal substrate 1 and the bolt 15
A single-sided toothed washer or a double-sided toothed washer 23 is inserted between the fixing member 13 and the fixing member 13, and the washer 2 is tightened by tightening the bolt 15.
By upwardly pressing 3, the upward joint body 2 becomes a horizontal substrate 1
Since the bolts 15 are loosely connected, the staircase unit 4A does not rotate or rattle. This position-fixed upwards The position-fixed downwards joint body 3 is fitted with the separation type staircase unit 4D of the next stage or the fixed type staircase unit 4 upwards joint body 2 and similarly tightened with bolts 7. Fixed.

When using the separation type staircase unit 4E in which the upward joint body 2 is separately configured as shown in FIG. 30, the upward joint body 2 or the base staircase unit 4G of the lower fixed type staircase unit 4 is used. After fitting the downward joint body 3 of the staircase unit 4E into the upward joint body 2 and tightening and fixing the upward joint body 2 and the downward joint body 3 with bolts 7, the upward joint body 2 of the staircase unit 4E is directed upward. The joint body 2 is rotated by a required angle. As shown in FIG. 31, after the upward coupling body 2 is stopped and held at that position, the receiving hole 20 that matches the through hole 18 of the mounting body 17 is formed in the horizontal substrate 1 by the drill device, and then the through hole 18 By screwing the tapping screw 19 into the receiving hole 20, the upward joint body 2 is fastened and fixed to the horizontal substrate 1.

The upright joint body 2 fixed in this position is fitted with the downward-separated joint body 4 of the separation type staircase unit 4E or the fixed type staircase unit 4, and is similarly tightened and fixed by bolts 7.

When the separation type staircase unit 4F in which the downward joint body 3 is separated as shown in FIG. 32 is used, the downward joint body 3 of the upper fixed type staircase unit 4 or the staircase unit 4H for the top is used. After fitting the upward joint body 2 of the staircase unit 4F to the downward joint body 3 and tightening and fixing the downward joint body 3 and the upward joint body 2 with the bolt 7, the downward joint body 3 of the staircase unit 4F is directed downward with respect to the horizontal substrate 1. The joint body 3 is rotated by a required angle. After the downward coupling body 3 is stopped and held at that position, a receiving device 20 is formed in the horizontal substrate 1 by the drilling device so as to match the through hole 18 of the mounting body 17, and then the tapping screw 19 is received from the through hole 18. The downward joint body 3 is screwed into the horizontal substrate 1
Tighten and fix to.

The downward joint body 3 fixed at this position is fitted with the separation joint staircase unit 4F of the next stage or the upward joint body 2 of the fixed staircase unit 4, and is similarly tightened and fixed by a bolt 7.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the separation type staircase unit 4 shown in FIGS. 1 to 4, the upward joint body 2 and the downward joint body 3 are constituted by a square groove body produced by bending a metal plate material, and the side opening portion is formed. There are only lighter weights present. In this staircase unit 4A, the upward joint body 2 is configured separately, the plate-shaped fixing body 9 is slightly retracted and welded to the lower end portion of the upward joint body 2, and the one-sided or double-sided toothed washer 22 is inserted into the retracted space. ing. The through hole 10 is formed in the center of the fixing body 9. The fixing bolt 11 whose head is welded to the lower surface of the horizontal substrate 1 has a screw shaft portion projecting at a right angle from the through hole 54 of the horizontal substrate to the upper surface of the horizontal substrate 1. Nut 12 and fixing body 9
A washer 22 is also interposed between them.

The long holes 5 on the three side surfaces of the upward joint body 2 and the lateral holes 29 communicating with the nut portion 6 are formed in the metal plate material before bending. The nut portion 6 is welded to the outer surface of the downward joint body 3. Since the upward joint body 2 is closely fitted to the downward joint body 3 with as little play as possible, the downward joint body 3
The inner dimension of is close to the outer dimension of the upward joint body 2 as much as possible.

The downward joint body 3 is welded to the horizontal substrate 1 by fitting the upper end portion into a square hole 31 formed in the front end portion of the horizontal substrate 1. A reinforcing plate 32 bent into a rectangular groove is welded to the side surface of the upper end portion of the downward joint body 3, and the reinforcing plate 32 is welded to the lower surface of the horizontal substrate 1. In addition, the downward joint body 3
Two reinforcing plates 33 having a triangular shape are welded at symmetrical positions between and the horizontal substrate 1.

The horizontal substrate 1, the upward joint body 2, and the downward joint body 3 interconnected in this way form a skeletal structure of the staircase unit 4, but the appearance of the staircase unit 4 when installed in a building is improved. Therefore, as shown in FIGS. 23 and 24, the cosmetic cover body 34 manufactured by plastic molding is fitted to the skeleton structure. As shown in FIG. 20, the cover body 34 has six vertical holes 3 formed on the outer edge of the horizontal substrate 1.
By screwing the tapping screw 36 from 5 into the screw receiving tube portion 37 on the inner wall of the cover, the horizontal substrate 1
Stuck to. The cover body 34 is provided with a receiving tube portion 38 of the tread plate fixing screw 40 on the bottom surface portion.

As shown in FIG. 20, the tread 8 is a horizontal substrate 1
The screw 40 is screwed into the four screw holes 39 formed at the outer edge of the horizontal board 1 to be fixed to the upper surface side of the horizontal board 1. In order to accurately set the step board 8 in the horizontal position, A level adjusting plate 41 is inserted between the horizontal substrates 1. As shown in FIGS. 21 and 22, the level adjusting plate 41 has a nut 42 welded to the lower surface of the outer peripheral edge portion, and the tip of the screw 43 screwed into the nut 42 contacts the upper surface of the horizontal substrate 1. Touching.

The level adjusting plate 41 is easily set in a horizontal state by increasing or decreasing the screwing depth of the four screws 43, and the tread plate 8 abutting on the upper surface is also set horizontally.
A circular hole 44 into which the upward joint body 2 is loosely inserted is provided at the base end of the level adjusting plate 41. In addition, the level adjusting plate 41
An insertion hole 45 for the tread plate fixing screw 40 is provided at the tip edge portion of the. The downward edge 46 formed on the outer periphery of the level adjusting plate 41 is fitted to the upper end of the cover body 34.

When the height between the vertical staircase units 4 and 4 is adjusted, the lower end surface of the cover body 34 and the level adjusting plate 41 are adjusted.
A gap is formed between the upper surface of the joint body 2 and the base end portion of the upward joint body 2. In order to avoid this appearance, a plastic cover cylinder 47 of the same color as the cover body 34 is prepared. The cover cylinder 47 has a cylindrical shape as shown in FIGS. 25 and 26. The cover cylinder 47 is inserted into the lower end cylinder portion 48 of the cover body 34 when the upward joint body 2 and the downward joint body 3 are fitted together. The lower end tube portion 48
An annular projection 49 is formed on the inner surface of the cover cylinder 47.
The upper end of the insertion elastically abuts the annular convex portion 49 and is held stationary. When it is desired to positively prevent the rotation of the cover cylinder 47, the lower end flange portion 50 of the cover cylinder 47 is fixed to the lower level adjusting plate 41 by an adhesive material.

The basic structure of the other separation-type staircase units 4A to 4F and the fixed-type staircase unit 4 which will be described below is the connecting structure of the separately arranged upward joint body 2 and downward joint body 3 to the horizontal substrate 1. Except for the above points, the configuration is the same as that of the above-described separation type staircase unit, and therefore detailed description thereof will be omitted and only different points will be described.

The staircase unit for top 4H shown in FIGS. 5 to 8 is constructed by cutting out the base end side of the standard staircase unit, and three positions are provided on the bracket plate 27 vertically welded to the horizontal substrate 1. A screw insertion hole 51 is inserted in the.
A reinforcing plate 32 is welded between the lower end of the bracket plate 27 and the downward joint body 3.

In the base staircase unit 4G shown in FIGS. 9 to 11, screw insertion holes 52 are formed in the horizontal substrate 1, and these are formed in a tongue-and-groove shape that allows adjustment of the mounting position. There is. Four reinforcing plates 53 are welded to the ridge portion at the lower end portion of the upward joint body 2 having a rectangular groove shape.

In the fixed staircase unit 4 shown in FIGS. 12 to 15, the upward joint body 2 is welded to the horizontal substrate 1 by inserting the lower end portion into the square hole 30 formed at the base end portion of the horizontal substrate 1. Has been done. The downward joint body 3 is welded to the horizontal substrate 1 by fitting the upper end portion into another square hole 31 formed in the tip portion of the horizontal substrate 1. A reinforcing plate 32 bent into a rectangular groove is welded to the side surface of the lower end projecting portion of the upward joint body 2 and the upper end side surface of the downward joint body 3, and the reinforcing plate 32 is welded to the lower surface of the horizontal substrate 1. Further, two triangular reinforcing plates 33 are welded at symmetrical positions between the downward joint body 3 and the horizontal substrate 1.

Separated staircase unit 4B shown in FIG.
In, the downward joint body 3 having a rectangular tubular shape is separately configured. The fixing bolt 11 whose head is welded to the horizontal substrate 1 projects at a right angle to the lower surface of the horizontal substrate 1. The plate-shaped fixing member 9 is slightly retracted and welded to the upper end of the downward joint body 3,
The one-sided or double-sided toothed washer 22 and the head of the fixing bolt 11 are housed in the retracted space. The through hole 10 is formed in the center of the fixing body 9, and the washer 2 is also provided between the nut 12 and the fixing body 9.
2 is inserted.

In the angle-adjustable staircase unit 4C shown in FIG. 28, the upward groove-shaped joint body 2 is constructed separately.
The plate-shaped fixing body 13 is slightly retracted and welded to the lower end of the upward joint body 2, and the one-sided or double-sided toothed washer 23 is inserted into the retracted space. The through hole 14 is formed in the center of the fixing body 13. The nut portion 16 welded to the lower surface of the horizontal substrate 1 communicates with the through hole 55 of the horizontal substrate 1. A washer 23 is also interposed between the bolt 15 and the fixing body 13.

In the angle-adjustable staircase unit 4D shown in FIG. 29, the downward joint body 3 having a rectangular tubular shape is separated, and the fixing member 13 having a flat plate shape is slightly retracted and welded to the upper end portion of the downward joint body 3. ing. The nut portion 16 welded to the lower surface of the horizontal substrate 1 and the one-sided or double-sided toothed washer 23 are inserted into the drawing space. The through hole 14 is formed in the center of the fixing body 13. A washer 23 is also interposed between the bolt 15 and the fixing body 13.

In the angle adjustment type staircase unit 4E shown in FIGS. 30 and 31, the flat plate-shaped mounting body 17 is the upward coupling body 2.
Are welded to the lower end surface of the upper joint body 2 and four through holes 18 are formed in the outer peripheral edge portion of the upward coupling body 2 projecting outward.

Angle adjustment type staircase unit 4 shown in FIG.
In F, the flat plate-shaped mounting body 17 is welded to the upper end surface of the downward joint body 3, and four through holes 18 are formed in the outer peripheral edge portion of the downward joint body 2 protruding outward.

In the standard type stair block shown in FIG. 33, the downward joint body 3 is fitted in the upward joint body 2, the nut portion 6 is fixed to the outer side surface of the upward joint body 2, and the long hole 5 is formed.
Are formed in the downward joint body 3. In the standard type staircase block shown in FIG. 34, the upward joint body 2 is fitted in the downward joint body 3, the nut portion 6 is fixed to the inner side surface of the upward joint body 2, and the elongated hole 5 is the downward joint body. 3 is drilled. In the standard staircase block shown in FIG. 35, the downward joint body 3 is fitted in the upward joint body 2, the nut portion 6 is fixed to the inner side surface of the downward joint body 3, and the long hole 5 is the upward joint body. 2 is drilled.

In the staircase unit 4 of FIGS. 34 and 35, the bolts 7 are tightened from the outside, so when the cover body is fitted into the staircase unit 4 first, the cover body is provided with an opening for inserting the turning tool. After fixing and fastening, the opening is closed with a lid member or the like if necessary. It is also possible to divide the cover body and adjust the height of the up-and-down staircase unit, and then connect and fix the division members of the cover body fitted to the skeletal structure with screws or an adhesive.

The present invention can be embodied in various forms, and the upward joint body 2 and the downward joint body 3 can be constituted by regular polygonal or non-regular polygonal grooves or cylinders, and a horizontal substrate. The method of fixing the upward joint body 2 and the downward joint body 3 to 1 is not limited to welding, and other known fixing methods can be adopted. In the fixed staircase unit 4 in which the upward joint body 2 and the downward joint body 3 cannot rotate with respect to the horizontal substrate 1,
The upward joint body 2 and the downward joint body 3 may be formed integrally with the horizontal substrate 1. Separate type stair unit 4A,
Also in 4B, 4C, 4D, 4E, and 4F, the upward joint body 2 and the downward joint body 3 which are not separated are connected to the horizontal substrate 1
It can also be manufactured integrally with.

[0050]

As described above, according to the first and second aspects of the invention, one of the upward joint body 2 and the downward joint body 3 of the staircase units 4A and 4B is separated from the horizontal substrate 1 to form a separate structure. A fixing body 9 is fixedly mounted on the upward joint body 2 or the downward joint body 3 and the through hole 10 is formed on the longitudinal center line of the upward joint body 2 or the downward joint body 3 which is separately configured in the fixing body 9.
After the bolts 11 that are inserted into the through holes 10 are vertically fixed to the horizontal substrate 1, and the separately arranged upward joint body 2 or downward joint body 3 is rotated by a predetermined angle with respect to the horizontal substrate 1. By screwing the nut 12 onto the bolt 11, the upward joint body 2 or the downward joint body 3 which is separated is tightened and fixed to the horizontal substrate 1, and the upward joint body 2
And the downward joint body 3 through the longitudinal long hole 5 provided in one of the upward joint body 1 and the downward joint body 3 to the nut portion 6 fixed to the other by bolting the bolt 7 to the upward joint body 2 and the downward joint body 3. Since the joint body 3 is fastened and fixed, it is possible to adjust the arrangement angle between the upper and lower staircase units and the height interval, and therefore can be widely used in various buildings with different installation modes,
Spiral stairs and stairs with landing can be constructed arbitrarily.

In the inventions of claims 3 and 4, one of the upward joint body 2 and the downward joint body 3 of the staircase units 4C and 4D is separated from the horizontal substrate 1, and the separated upward joint body 2 or downward joint body is formed. The fixing body 13 is fixed to the body 3, and the bolt 15 is inserted into the through hole 14 of the fixing body 13 provided on the longitudinal center line of the upward joint body 2 or the downward joint body 3 which is separately configured.
And the separated upward joint body 2 or downward joint body 3 is rotated about the bolt 15 by a required angle with respect to the horizontal substrate 1, and then the bolt portion 15 is fixed to the horizontal substrate 1 by a nut portion 16 fixed to the horizontal substrate 1. The upward joint body 2 or the downward joint body 3 which is configured separately is fastened and fixed to the horizontal base plate 1 by screwing into the vertical joint 5, and from the longitudinal long hole 5 provided in one of the upward joint body 2 and the downward joint body 3. By screwing a bolt 7 into a nut portion 6 fixed to the other of the upward joint body 2 and the downward joint body 3, the upward joint body 2 and the downward joint body 3
Since it is fastened and fixed, it is possible to adjust the arrangement angle and height interval between the upper and lower staircase units, can be widely used in various buildings with different installation modes, and can arbitrarily construct a spiral staircase or a staircase with a landing.

According to the fifth and sixth aspects of the invention, one of the upward joint body 2 and the downward joint body 3 of the staircase units 4E and 4F is formed separately from the horizontal substrate 1, and the upward joint body 2 is formed separately. An upward joint body 2 or a downward joint body 3 in which a mounting body 17 is fixedly mounted on the downward joint body 3 and separated and configured.
Is rotated with respect to the horizontal substrate 1 by a required angle, and then a tapping screw 19 is screwed into a receiving hole 20 provided in the horizontal substrate 1 from a through hole 18 provided in the mounting body 17 to form a separated upward joint body. 2 or the downward joint body 3 is fastened and fixed to the horizontal substrate 1, and the vertical elongated hole 5 provided in one of the upward joint body 2 and the downward joint body 3 is connected to the other of the upward joint body 2 and the downward joint body 3. Since the upward joint body 2 and the downward joint body 3 are fastened and fixed by screwing the bolt 7 into the fixed nut portion 6, it is possible to adjust the arrangement angle and the height interval between the vertical step units. Therefore, it can be widely used in various buildings with different installation modes, and spiral stairs and stairs with a landing can be arbitrarily constructed.

In the inventions of claims 2 to 6, in order to adjust the arrangement angle between the upper and lower staircase units, the entire staircase units 4A, 4B, 4C, 4D, 4E, 4F are not rotated, but Since only the upward joint body 2 or the downward joint body 3 separated from the horizontal substrate 1 is rotationally operated, it suffices to stop and hold the comparatively lightweight upward joint body 2 or downward joint body 3 at the set angle position. In particular, the staircase unit can be assembled efficiently without requiring an auxiliary worker, and the labor cost can be reduced.

In the invention of claim 7, the fixed type staircase unit 4 in which both the upward joint body 2 and the downward joint body 3 are fixed to the horizontal substrate 1 from the beginning is used as the separated staircase units 4A, 4B. Since it is used in combination with 4C, 4D, 4E, and 4F, the entire staircase is more firmly assembled, and the relative rotation of the upper and lower staircase units is suppressed even when the staircase weight or the rotational moment due to the applied load acts. Dangerous rocking of the entire stairs is accurately prevented.

In the eighth aspect of the present invention, the one-sided toothed washer or the two-sided toothed washer 21 is interposed between the head of the bolt 7 and the upward joint body 2 or the downward joint body 3 to make the upward joint body 2 and the downward joint body. Since the body 3 is fastened and fixed, the washer 2
When the teeth of No. 1 bite into the contact surface, the upward joint body 2
The downward coupling body 3 is firmly connected to each other, and the vertical staircase unit is not displaced along the longitudinal long hole 5. Therefore, the height between the staircase units does not change from the initial size at the time of assembly, and the staircase unit can be used in a stable state without rattling.

According to the ninth aspect of the invention, the one-sided toothed washer or the two-sided toothed washer 22 is interposed between the fixing body 9 and the horizontal base plate 1 or between the nut 12 and the fixing body 9 so that the upward coupling body 2 is provided. Alternatively, since the downward joint body 3 is fastened and fixed to the horizontal base plate 1, the teeth of the washer 22 bite into the contact surface to firmly connect the upward joint body 2 or the downward joint body 3 to the horizontal base plate 1, Since the upward joint body 2 and the downward joint body 3 cannot rotate around the bolts 11, the arrangement angle between the staircase units does not change at all, and it can be used in a stable state without rattling. ..

In the tenth aspect of the present invention, the one-sided toothed washer or the two-sided toothed washer 23 is interposed between the fixing body 13 and the horizontal substrate 1 or between the bolt 15 and the fixing body 13, and the upward coupling body 2 or Since the downward joint body 3 is fastened and fixed to the horizontal base plate 1, the teeth of the washer 23 bite into the contact surface to firmly connect the upward joint body 2 or the downward joint body 3 to the horizontal base plate 1, and Since the joint body 2 and the downward joint body 3 cannot rotate about the bolts 15, the arrangement angle between the staircase units does not change at all, and the unit can be used in a stable state without rattling.

[Brief description of drawings]

FIG. 1 is a plan view of a separable staircase unit used in a prefabricated staircase according to an embodiment of the present invention.

FIG. 2 is a front view of the staircase unit.

FIG. 3 is a left side view of the staircase unit.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a plan view of a stair unit for a top used in the prefabricated staircase.

FIG. 6 is a front view of the staircase unit of FIG.

FIG. 7 is a right side view of the staircase unit of FIG.

8 is a cross-sectional view taken along the line BB of FIG.

FIG. 9 is a plan view of a base staircase unit used in the prefabricated staircase.

FIG. 10 is a front view of the staircase unit of FIG. 9.

FIG. 11 is a sectional view taken along line CC of FIG.

FIG. 12 is a plan view of a fixed staircase unit used in the prefabricated staircase.

FIG. 13 is a front view of the staircase unit of FIG.

14 is a right side view of the staircase unit of FIG. 12. FIG.

15 is a cross-sectional view taken along line DD of FIG.

FIG. 16 is a front view of a prefabricated staircase constructed by the staircase units.

17 is a vertical cross-sectional view of the upper end portion of the stairs in FIG.

FIG. 18 is a vertical sectional view of an intermediate portion of the stairs of FIG.

19 is a vertical cross-sectional view of the lower end portion of the stairs in FIG.

20 is a longitudinal cross-sectional view of a main part of the staircase of FIG. 16 completed by attaching a tread.

FIG. 21 is a plan view of a level adjusting plate used for the stairs.

FIG. 22 is a front view of the level adjusting plate.

FIG. 23 is a plan view of a cover body used for the stairs.

24 is a sectional view taken along line EE of FIG.

FIG. 25 is a plan view of a cover cylinder used for the stairs.

FIG. 26 is a front view of the cover cylinder.

FIG. 27 is a vertical cross-sectional view of another disassembled staircase unit in an exploded state.

FIG. 28 is a vertical cross-sectional view of yet another disassembled staircase unit in an exploded state.

FIG. 29 is a vertical cross-sectional view showing another disassembled staircase unit in an exploded state.

FIG. 30 is a vertical cross-sectional view of still another separation type staircase unit in an exploded state.

31 is a plan view of the staircase unit of FIG. 30. FIG.

FIG. 32 is a vertical cross-sectional view of yet another disassembled staircase unit in an exploded state.

FIG. 33 is a vertical cross-sectional view of another fixed-type staircase unit.

FIG. 34 is a vertical cross-sectional view of another fixed-type staircase unit.

FIG. 35 is a vertical cross-sectional view of another fixed-type staircase unit in an exploded state.

[Explanation of symbols]

 1 horizontal board 2 upward joint body 3 downward joint body 4 fixed staircase unit 4A separation type staircase unit 4B separation type staircase unit 4C separation type staircase unit 4D separation type staircase unit 4E separation type staircase unit 4F separation type Staircase unit 4G Base staircase unit 4H Top staircase unit 5 Longitudinal hole 6 Nut part 7 Bolt 8 Tread plate 9 Fixing body 10 Through hole 11 Bolt 12 Nut 13 Fixing body 14 Through hole 15 Bolt 16 Nut part 17 Mounting body 18 Through Hole 19 Tapping Screw 20 Receiving Hole 21 Single-sided or Double-sided Toothed Washer 22 Single-sided or Double-sided Toothed Washer 23 Single-sided or Double-sided Toothed Washer 32 Reinforcement Plate 33 Reinforcement Plate 34 Cover Body 36 Cover Body Fixing Screw 40 Tread Plate Fixing Screw 41 level adjusting plate 43 adjusting screw 47 cover cylinder

Claims (10)

[Claims] 1. An upper joint body 2 and a lower joint body 3 are vertically projected on a base end portion and a front end portion of a horizontal substrate 1, and the upper joint body 2 and the downward joint body 3 are fitted to each other to form a plurality of upper and lower stages. A staircase unit 4A connected to the upward coupling body 2 and the downward coupling body 3 are screwed into a nut portion 6 fixed to the other from a longitudinal elongated hole 5 provided in one of the upward coupling body 2 and the downward coupling body 3, A bolt 7 for tightening and fixing the joint body 3; and a tread plate 8 fixed to the upper surface side of the horizontal base plate 1. The upward joint body 2 is configured separately from the horizontal base plate 1, and the upward joint body 2 is fixed to the fixing body 9. The fixing member 9 is provided with the through hole 10 on the vertical center line of the upward joint body 2, the bolt 11 is vertically fixed on the horizontal substrate 1, and the nut 11 is attached to the bolt 11 inserted into the through hole 10.
By screwing the upward joint body 2 into the horizontal substrate 1
Assembled stairs that are fastened and fixed to. 2. An upward joint body 2 and a downward joint body 3 are vertically projectingly provided at a base end portion and a distal end portion of a horizontal substrate 1, and the upward joint body 2 and the downward joint body 3 are fitted to each other to form a plurality of upper and lower stages. And a staircase unit 4B connected to the upward joint body 2 and the downward joint body 3 are screwed into a nut portion 6 fixed to the other from a longitudinal long hole 5 provided in one of the upward joint body 2 and the downward joint body 3, A bolt 7 for tightening and fixing the joint body 3; and a tread plate 8 fixed to the upper surface side of the horizontal base plate 1. The downward joint body 3 is formed separately from the horizontal base plate 1, and the downward joint body 3 is fixed to the fixing body. 9 is fixed, the fixing body 9 is provided with a through hole 10 on the vertical center line of the downward joint body 3, the bolt 11 is vertically fixed on the horizontal substrate 1, and the bolt 11 inserted into the through hole 10 is fixed to the nut 1.
A prefabricated staircase in which the downward joint body 3 is clamped and fixed to the horizontal base plate 1 by screwing 2 together. 3. An upward joint body (2) and a downward joint body (3) are vertically projectingly provided at a base end portion and a distal end portion of a horizontal substrate (1), and the upward joint body (2) and the downward joint body (3) are fitted to each other to form a plurality of upper and lower stages. A staircase unit 4C connected to the upward coupling body 2 and the downward coupling body 3 are screwed into a nut portion 6 fixed to the other from a longitudinal elongated hole 5 provided in one of the upward coupling body 2 and the downward coupling body 3, A bolt 7 for fastening and fixing the joint body 3; and a tread plate 8 fixed to the upper surface side of the horizontal base plate 1. The upward joint body 2 is configured separately from the horizontal base plate 1, and the upward joint body 2 is fixed to the fixing body 13. Is fixed, the bolt 15 is inserted into the through hole 14 of the fixing body 13 provided on the vertical center line of the upward joint body 2, and the bolt 15 is screwed into the nut portion 16 fixed to the horizontal substrate 1. , Assembled stairs for fastening the upward joint body 2 to the horizontal base plate 1 by fastening . 4. An upper joint body 2 and a lower joint body 3 are vertically projectingly provided on a base end portion and a front end portion of a horizontal substrate 1, and the upper joint body 2 and the downward joint body 3 are fitted to each other to form a plurality of upper and lower stages. A staircase unit 4D connected to the upward joint body 2 and the downward joint body 3 by being screwed into a nut portion 6 fixed to the other from a longitudinal elongated hole 5 provided in one of the upward joint body 2 and the downward joint body 3 A bolt 7 for fastening and fixing the joint body 3; and a tread plate 8 fixed to the upper surface side of the horizontal base plate 1. The downward joint body 3 is configured separately from the horizontal base plate 1, and the downward joint body 3 is fixed to the fixing body 13. Is fixed, the bolt 15 is inserted into the through hole 14 of the fixing body 13 provided on the vertical centerline of the downward joint body 3, and the bolt 15 is screwed into the nut portion 16 fixed to the horizontal substrate 1. , Assembled stairs that clamps the downward joint body 3 to the horizontal substrate 1 . 5. An upward joint body (2) and a downward joint body (3) are vertically projectingly provided at a base end portion and a distal end portion of a horizontal substrate (1), and the upward joint body (2) and the downward joint body (3) are fitted to each other to form a plurality of upper and lower stages. A staircase unit 4E connected to the upward joint body 2 and the downward joint body 3 are screwed into the nut portion 6 fixed to the longitudinal elongated hole 5 provided in one of the upward joint body 2 and the downward joint body 3 and downward. A bolt 7 for tightening and fixing the joint body 3; and a tread plate 8 fixed to the upper surface side of the horizontal base plate 1. The upward joint body 2 is formed separately from the horizontal base plate 1, and the upward joint body 2 is separated and configured. The mounting body 17 is fixed, and the tapping screw 19 is screwed into the receiving hole 20 formed in the horizontal substrate 1 from the through hole 18 formed in the mounting plate 17, so that the upward joint body 2 is fastened and fixed to the horizontal substrate 1. Prefabricated stairs. 6. An upper joint body 2 and a lower joint body 3 are vertically projectingly provided on a base end portion and a front end portion of a horizontal substrate 1, and the upward joint body 2 and the downward joint body 3 are fitted to each other to form a plurality of upper and lower stages. A staircase unit 4F that is connected to the upward coupling body 2 and the downward coupling body 3 are screwed into a nut portion 6 fixed to the other from a longitudinal elongated hole 5 provided in one of the upward coupling body 2 and the downward coupling body 3, A bolt 7 for tightening and fixing the joint body 3; and a tread plate 8 fixed to the upper surface side of the horizontal base plate 1. The downward joint body 3 is configured separately from the horizontal base plate 1. The mounting body 17 is fixed, and the tapping screw 19 is screwed into the receiving hole 20 provided in the horizontal substrate 1 from the through hole 18 formed in the mounting plate 17, so that the downward joint body 3 is fastened and fixed to the horizontal substrate 1. Prefabricated stairs. 7. An upward joint body 2 and a downward joint body 3 are vertically fixed to a base end portion and a distal end portion of a horizontal substrate 1, and the upward joint body 2 and the downward joint body 3 are fitted to each other to form a plurality of upper and lower stages. The stair unit 4 to be connected is used by incorporating it in a part of the stairs
An upward joint body 2 of the staircase unit 4 is formed by screwing a bolt 7 into a nut portion 6 fixedly provided in the vertical elongated hole 5 provided in one of the upward joint body 2 and the downward joint body 3.
7. The assembled staircase according to claim 1, wherein the downward joint body 3 is fastened and fixed, and the tread plate 8 is fixed to the upper surface side of the horizontal base plate 1 of the staircase unit 4. 8. A single-sided toothed washer or a double-sided toothed washer 2
The assembled staircase according to claim 1, wherein 1 is interposed between the head of the bolt 7 and the upward joint body 2 or the downward joint body 3 and the upward joint body 2 and the downward joint body 3 are fastened and fixed. .. 9. A single-sided toothed washer or a double-sided toothed washer 2
2. The upward joint body 2 or the downward joint body 3 is clamped and fixed to the horizontal substrate 1 by interposing 2 between the fixing body 9 and the horizontal substrate 1 and / or between the nut 12 and the fixing body 9. The prefabricated staircase according to claim 2. 10. An upward joint body 2 or a downward joint by interposing a single-sided toothed washer or a double-sided toothed washer 23 between the fixing body 13 and the horizontal substrate 1 and / or between the bolt 15 and the fixing body 13. The assembled staircase according to claim 3 or 4, wherein the body 3 is clamped and fixed to the horizontal substrate 1.